drm/msm/gpu: Don't map command buffers with nr_relocs equal to 0

If a command buffer doesn't have any relocs assigned to it there then
is no need to map it in the kernel address space.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 7a7923e6220da89b252997d9f9bb674e0b7802dd..66673ea9bf6f8c37810a3ba05fbe9130e0c42a67 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -317,6 +317,9 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
        uint32_t *ptr;
        int ret = 0;
 
+       if (!nr_relocs)
+               return 0;
+
        if (offset % 4) {
                DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
                return -EINVAL;